Live Wilderness Adventure

Heat up one last time.

When Bi Fang took the steel bar out of the blast furnace, his whole body trembled.

Exhausted or excited?

Or both?

It's hard to tell. At the moment of harvest, all sufferings are turned into the sweetest fruits, and all kinds of tastes are in it.

The dazzling metal in front of you can no longer be called iron, but steel!

Stronger, stronger, sharper! ! !

Taking a deep breath, Bi Fang slowed down and felt dizzy due to overwork. The familiar wooden handle was firmly held in his hand, and the force rose from one point, fell from height, and slammed heavily on the steel bar.

There is no more black iron sheet falling, and all impurities tend to the limit of manual removal.

Squeezed by force, the bright orange steel is squeezed a little bit, deformed, and becomes flat and long and narrow.

The prototype of the dagger has gradually emerged.

Steel, however, is far from being as easy to build as iron.

Whether it is hardness, toughness, or final sharpness, steel is far superior to iron, and the same is true in tempering. Bi Fang is very careful, lest any hammer be crooked, he will have to start all over again.

There is not enough time for Bi Fang to do this. The sun is rising high, and around nine o'clock, Mo will go out to eat and rest. The forging time left for him may not be six hours.

I really feel nervous about participating in the Broken Knife Contest.

"In order to make a usable dagger today, I don't plan to sharpen it. There is no sharpening machine. If you want to sharpen the edge, you must use a whetstone to sharpen it. As long as the ghost needs to sharpen it."

"So I plan to make it into a double-edged dagger, which doesn't need to be sharpened, but the tip can be stabbed, which is practical. Besides, our steel is just the most common steel in the end, and no one knows how strong it is. , without cutting edge, you can also use thickness to make up for strength.”

Opening the blade will inevitably cause the edge to become thinner. Bi Fang does not have much confidence in the strength of the blade he has created, and he is worried that it will easily cause cracking.

Heating, forging, heating, forging.

The sun rises from the east, moves to the south, and tends to move to the west.

After eating the mushroom and rabbit broth, Bi Fang soaked his hands in the puddle for a while, regained some energy, and added the red dagger.

Yes, the dagger.

After nearly six days of hard work, at noon on the last day, the prototype of the dagger finally appeared.

The slender iron handle was finally used to glue and wood the handle. The blade was more than 20 centimeters long and narrow, like a bayonet, but it was too thin and the ridge was thick, obviously not fully unfolded.

Bi Fang replaced the sledgehammer with a smaller one that could better control the force, and thumped it finely and evenly.

The dazzling fire made Bi Fang's face red. From the early hours of yesterday until now, the charcoal in the blast furnace has not been heard, and it has been burning all the time, adding a little fanaticism to the sweltering rainforest.

【Swordsmith! 】

[When did LOL come out with Lao Fang's hero, wild hunter, part-time sword-making, it's best to be a jungler! 】

【I think so】

[This muscle, I call it the sexiest man, is it okay? 】

【I think so too】

【A thousand people petition! I'll buy it when I get the skin! 】

The hard steel bar was stretched open again, from slender to long and narrow, extending from the ridge to both sides, and the top became sharper.

This is metal steel!

What wooden spears, bone spears, and metal steel, are all weak!

At three o'clock in the afternoon, the light was still good, and the dagger had changed a lot again, and it really had the appearance of a knife.

Bi Fang raised the dagger and squatted down to check the lines on each side.

The shape is not exaggerated, it is the same as the usual double-edged dagger, but this is completely made with bare hands when there is nothing left!

From any aspect of Bi Fang, the lines have reached the limit that can be achieved by hand. The spine of the knife is straight and even, the blade that opens to both sides is even and smooth, and the tip of the knife is sharp and stylish. Praise it for being a sharp knife.

[Damn it, I haven't watched it for two hours, it's changed a lot]

【Looks like you want, woo woo woo】

[Unlock Achievement: Come Hard]

[Unlock Achievement: Unicorn Arm]

[Hey, there are still three hours left for the live broadcast to end, I don’t know how long to wait next time]

[It's mid-June now, at least July, right? 】

Bi Fang clamped the steel dagger with wooden tongs and heated it for the last time. At the same time, he added a lot of sand and soil under the furnace bridge. This step was so fast that the audience did not see it clearly. Put the weird ash in it.

Next is the final step.

Gu Ling

Quenched.

This time Bi Fang removed the blower, otherwise the heating temperature would be too high.

"The heat treatment of steel generally includes four basic processes: annealing, normalizing, quenching and tempering. It is also the 'four fires' in the overall heat treatment. Among them, quenching and tempering are closely related and are often used together, and neither is indispensable."

"I won't go into details about annealing and normalizing. I won't use it next, mainly tempering and quenching. Maybe more people have heard of quenching. What they usually see is the metal that has just been heated. smoke."

【I often see it on TV】

【I have seen】

[Tears of engineering materials, this course is too difficult, iron-carbon phase diagram alloy phase diagram]

[I don't want to listen anymore, I'm going crazy]

"Hahaha, engineering materials are really difficult." Bi Fang himself had a headache to learn. Not all of what he knew was given by the system, and a lot of knowledge was taught by Bi Fang himself.

"Metal heating, austenitizing and cooling in an appropriate way to obtain a heat treatment process of martensite or bainite structure, is the so-called quenching, the most common are water cooling, oil cooling, air cooling, water cooling is what you just said, go to As soon as you put it in the water, it will quickly cool down."

"We don't have so much oil, and we can only choose water cooling and air cooling, and different cooling materials will have different properties."

"In order to reduce the brittleness of steel parts, the quenched steel parts are kept at an appropriate temperature higher than room temperature but lower than 710 ° C for a long time, and then cooled, which is tempering."

Bi Fang opened the lid of the furnace and carefully observed the color of the dagger.

"This is the last step in the production of the dagger. First, we need to burn the dagger to red. Remember, it can only be red, but never white, that is, the orange-yellow stage. The white knife is very easy to deform, and it is too Crisp, what is the specific temperature, you can find the color map of steel heating on the Internet.”

Seeing the opportunity, he took the red dagger out of the furnace. Bi Fang clamped it on the blade and brought it into the water basin. Instead of inserting it at full speed, he put the blade in, and when the high temperature touched the cold water, it exploded instantly. flame.

[Fuck, will it catch fire? 】

[Will the water catch fire? 】

[Water will decompose at high temperature, producing hydrogen and oxygen, and then burning at high temperature. This is the reason why in a very hot stove, a little water can help the combustion more. 】

[What fart are you doing, sprinkle water to help burn? Is there a lot of calories that have not been generated yet? 】

[Wrong, delete it. Quenching will burn because it is not water but oil that is quenched. Water droplets will burn in the furnace because water and carbon generate hydrogen and carbon monoxide under high temperature conditions, which is called water gas. Read more books and pack less ×】

[Where did the first-level number come from? Look clearly, is this **** oil? 】

【Why don't you ask the old magician? 】

Bi Fang didn't have time to answer, the quenching practice and rhythm must be grasped well, the blade was soaked in water for only two or three seconds, he changed his face again, and a flame burst out again.

Under the drone photography, the audience saw that a layer of oxide film was directly peeled off on the surface of the blade, which was still brownish yellow.

"In addition to water quenching, you can also use oil cooling, just use waste oil. I don't think there will be warriors for diesel gasoline for quenching, right?"

"As for the oil quenching process, it is basically the same as water quenching. Heat it to red and immerse it directly. When the waste oil is no longer bubbling, use a stone or sandpaper to polish off the iron oxide on the quenched knife, and then it can be tempered."

After that, Bi Fang kept repeating this process, until the color no longer faded, and then sent it to the furnace for heat preservation and tempering again.

This time, the audience discovered that Bi Fang no longer put the knife into the flame, but opened the fire pit and sent a dead leaf into the sand pit. When he saw that it turned brown but not black or burning, he directly sent the dagger into the fire pit. In the sand under the furnace bridge.

Then some water was sprinkled on the charcoal fire on the bridge, and it was extinguished, and the steam came out.

what the hell?

At this time, Bi Fangcai saw the audience's quarrel, flipped through the barrage, and said with a smile: "It's true that the varnish is burning, but it's not true, it's not simple high temperature that can directly decompose water, it's water and high temperature air. Ferric oxide and hydrogen can be generated only by reacting with hot iron, and the high-temperature hydrogen contacts the oxygen in the air and spontaneously ignites immediately.”

"Didn't you just see a layer of film peeled off? That's iron tetroxide."

audience:"......"

Co-authoring a white quarrel?

[I said that high temperature cannot directly decompose water! 】

[Pull it down, after the cannon]

【Shit! 】

[So what did Lao Fang just do? Turn off the stove like that? 】

"Tempering~www.readwn.com~ No matter what kind of quenching method, it must be tempered afterwards to make the steel more stable and tough. I use the sand-burning method."

Sitting on the ground, Bi Fang used a tree stick to poke the sand under the furnace bridge.

"The tempering temperature does not need to be so high, but the temperature is not easy to confirm. The best way is to heat the sand. When you feel almost the same, you can make a leaf that is not so dry, or a piece of paper, which becomes a piece of paper. When it is browned but not black and not burning, the temperature is the appropriate tempering temperature.”

Bi Fang plucked out the leaves that he had just thrown in. As expected, the surface was brownish-yellow, but it didn't turn black or even burn.

"At this point, bury the knife in the sand, let the fool and the blade cool down together, and the tempering is over, and we have a final dagger. Of course, it still needs to be sharpened a little."

After saying this, Bi Fang felt relieved, his whole body slumped to the ground, and every muscle wailed.

too tired.

But, it's finally done.

Steel dagger!